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BRITISH STANDARD BS EN61557-10:2001

IEC 61557-10:2000

Electrical safety in lowvoltage distribution

systems up to 1000 V a.c.

and 1500 V d.c.

Equipment for testing,

measuring or

monitoring of

protective measures

Part 10: Combined measuringequipment for testing, measuring ormonitoring of protective measures

The European Standard EN 61557-10:2001 has the status of aBritish Standard

ICS 17.220.20

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

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BS EN 61557-10:2001

This British Standard, havingbeen prepared under thedirection of theElectrotechnical SectorCommittee, was published

under the authority of theStandards Committee andcomes into effect on15 July 2001

BSI 07-2001

ISBN 0 580 37689 3

National foreword

This British Standard is the official English language version ofEN 61557-10:2001. It is identical with IEC 61557-10:2000

The UK participation in its preparation was entrusted to Technical Committee

PEL/85, Measuring equipment for electrical and electromagnetic quantities,which has the responsibility to:

A list of organizations represented on this committee can be obtained onrequest to its secretary.

From 1 January 1997, all IEC publications have the number 60000 added tothe old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1.For a period of time during the change over from one numbering system to theother, publications may contain identifiers from both systems.

Cross-references

Attention is drawn to the fact that CEN and CENELEC Standards normallyinclude an annex which lists normative references to internationalpublications with their corresponding European publications. The BritishStandards which implement these international or European publications maybe found in the BSI Standards Catalogue under the section entitledInternational Standards Correspondence Index, or by using the Findfacility of the BSI Standards Electronic Catalogue.

A British Standard does not purport to include all the necessary provisions ofa contract. Users of British Standards are responsible for their correctapplication.

Compliance with a British Standard does not of itself confer immunityfrom legal obligations.

aid enquirers to understand the text;

present to the responsible international/European committee anyenquiries on the interpretation, or proposals for change, and keep theUK interests informed;

monitor related international and European developments andpromulgate them in the UK.

Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page,pages 2 to 6, an inside back cover and a back cover.

The BSI copyright date displayed in this document indicates when thedocument was last issued.

Amendments issued since publication

Amd. No. Date Comments

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EUROPEAN STANDARD EN 61557-10

NORME EUROPENNE

EUROPISCHE NORM April 2001

CENELECEuropean Committee for Electrotechnical Standardization

Comit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61557-10:2001 E

ICS 17.220.20;29.080.01;29.240.01

English version

Electrical safety in low voltage distribution systemsup to 1 000 V a.c. and 1 500 V d.c. -

Equipment for testing, measuring or monitoring of protective measuresPart 10: Combined measuring equipment for testing, measuring

or monitoring of protective measures

(IEC 61557-10:2000)

Scurit lectrique dans les rseauxde distribution basse tension jusqu'1 000 V c.a. et 1 500 V d.c. -Dispositifs de contrle, de mesure ou desurveillance des mesures de protectionPartie 10: Appareils combins de contrle,de mesure ou de surveillance de mesuresde protection

(CEI 61557-10:2000)

Elektrische Sicherheit inNiederspannungsnetzen bis AC 1000 Vund DC 1500 V -Gerte zum Prfen, Messen oderberwachen von SchutzmanahmenTeil 10: Kombinierte Messgerte zumPrfen, Messen oder berwachen vonSchutzmanahmen

(IEC 61557-10:2000)

This European Standard was approved by CENELEC on 2001-03-01. CENELEC members are bound tocomply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained onapplication to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any otherlanguage made by translation under the responsibility of a CENELEC member into its own language andnotified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,Portugal, Spain, Sweden, Switzerland and United Kingdom.

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Foreword

The text of document 85/213/FDIS, future edition 1 of IEC 61557-10, prepared by IEC TC 85, Measuringequipment for electrical and electromagnetic quantities, was submitted to the IEC-CENELEC parallel voteand was approved by CENELEC as EN 61557-10 on 2001-03-01.

This part 10 is to be used in conjunction with EN 61557-1.

The following dates were fixed:

latest date by which the EN has to be implementedat national level by publication of an identicalnational standard or by endorsement (dop) 2001-12-01

latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2004-03-01

__________

Endorsement notice

The text of the International Standard IEC 61557-10:2000 was approved by CENELEC as a EuropeanStandard without any modification.

__________

EN 6155710:2001

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BSI 07-2001

CONTENTS

Page

1 Scope .............................................................................................................................. 42 Normative references....................................................................................................... 4

3 Definitions ....................................................................................................................... 4

4 Requirements .................................................................................................................. 4

5 Marking and operating instructions .................................................................................. 6

6 Tests ............................................................................................................................... 6

EN 6155710:2001

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ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMSUP TO 1 000 V a.c. AND 1 500 V d.c.

EQUIPMENT FOR TESTING, MEASURING OR MONITORINGOF PROTECTIVE MEASURES

Part 10: Combined measuring equipment for testing,measuring or monitoring of protective measures

1 Scope

This part of IEC 61557 specifies the requirements for combined measuring equipment whichcombines into one piece of apparatus, several measuring functions or methods of testing,

measuring or monitoring, some or all of which are covered in parts 2 to 7.

2 Normative references

Clause 2 of parts 1 to 7 of IEC 61557 applies.

3 Definitions

For the purposes of this part of IEC 61557, the definitions given in parts 1 to 7 of IEC 61557and the following definitions apply.

3.1combined measuring equipmentequipment which combines, into one piece of apparatus, several measuring functions ormethods of testing, measuring or monitoring, some or all of which are in accordance with

other parts of IEC 61557

3.2extraneous overvoltage

voltage applied to the terminals of the combined measuring equipment to test the overvoltagewithstand capability

4 Requirements

The requirements specified in the respective parts of the IEC 61557 series and the followingrequirements shall apply:

4.1 A user shall not be subjected to danger when the highest extraneous overvoltageaccording to the respective parts of this standard (see table 1) is accidentally applied to eachcombination of all test/measurement terminals in every possible combination of functions andranges of a combined measuring equipment, even though some of these functions are not

themselves covered by parts 2 to 7.

Al l other terminals shal l be clear ly identif iable. Any terminal which can be confused with atest/measurement terminal shall be indicated as such.

EN 6155710:2001

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Table 1 Extraneous overvoltage withstand capability

Part ofIEC 61557

2 3 4 5 6 7

Extraneousovervoltageand

duration time

1,2

U

N10 s

1,2

U

0continuous

and 1,1 phase to

phase voltage1 min

1,2

U

0continuous

1,2

U

0continuous

1,2

U

0continuous

and 1,1 phase to

phase voltage1 min

1,2

U

0continuous

The duration time shall be the longest possible indicated in the respective parts ofIEC 61557.

NOTE U0 is the voltage against earth (see 3.1.3a of IEC 61557-1).

UN is the nominal output voltage (see 3.2.1 of IEC 61557-1, and 3.1 of IEC 61557-2).

4.1.1 If parts of the combined measuring equipment are defective after the extraneousovervoltage is applied, the defect shall be clearly indicated. Indications and displayed valuesshall not lead to unsafe interpretations.

4.1.2 When the extraneous overvoltage is applied, protective devices may be activated. Theactivation of protective devices in equipment for measuring or testing insulation resistanceaccording to IEC 61557-2 shall be indicated, if the operation of the equipment is impaired.

4.2 When the combined measuring equipment bears one of the following markings, the

applied extraneous overvoltage can be reduced to a voltage of 1,1 phase to phase voltage:

a) DO NOT USE IN DISTRIBUTION SYSTEMS WITHVOLTAGES HIGHER THAN ... V.

The marking shall be written in the corresponding country language.

The value of the voltage shown on the marking shall be 1,1 maximum phase to phasevoltage.

or

b)

Example of pictogramfor a 500 V AC system

Pictogram and outline contrasting to the background

The value of the voltage shown on the marking shall be 1,1 maximum phase to phasevoltage.

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Combined measuring equipment bearing one of these markings shall withstand the abovespecified overvoltage for 1 min without any defect. Protective devices may be activatedaccording to 4.1.2.

If the combined measuring equipment includes an insulation resistance measuring or testingfunction, this function shall fulfill in addition the overvoltage requirement according toIEC 61557-2.

5 Marking and operating instructions

The requirements specified in the respective parts of IEC 61557 shall apply. If therequirements of 4.2 are applicable, the marking shall be clearly readable in the position ofnormal use.

6 Tests

In addition to the tests specified in the respective parts of IEC 61557, the following test shallbe executed:

6.1 The overvoltage withstand capability for the combined measuring equipment shall be

type tested by using an extraneous overvoltage either:

a) in accordance with 4.1

or

b) in accordance with 4.2

6.2 Compliance with the requirements given in clause 5 shall be verified (routine test).

6.3 The compliance with the test in this clause shall be recorded.

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BS EN 61557-10:2001IEC 61557-10:2000

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